WONDER LAKE, IL · McHenry County

WONDER LAKE Water System

Current status

1 item on record is open and awaiting resolution as of July 4, 2026. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings. Full details are in the violation history below.

This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.

System facts

System ID (PWSID): IL1115750
System type: Community Water System
Population served: 3,870
Service connections: 1,548
Ownership: local government
Water source: groundwater (wells)

Violation history

Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
July 1, 2025
Unaddressed
Lead Consumer Notice
—
Lead and Copper Rule
April 1, 2025 – August 27, 2025
Resolved
Public Notification Violation for NPDWR Violation
—
Public Notice
February 10, 2024 – April 8, 2024
Resolved
OCCT/SOWT Study/Recommendation
Health-based
Lead and Copper Rule
April 2, 2023 – June 22, 2023
Resolved
Monitoring, Regular
—
Nitrate
January 1, 2022 – December 31, 2022
Resolved
Public Notification Violation without NPDWR Violation
—
Public Notice
March 12, 2005 – July 28, 2005
Resolved
Monitoring and Reporting (DBP)
—
Total Haloacetic Acids (HAA5)
April 1, 2004 – June 30, 2004
Resolved
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 2002 – May 31, 2002
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1998 – July 31, 1998
Archived
Monitoring, Routine Minor (TCR)
—
Coliform (TCR)
July 1, 1995 – July 31, 1995
Archived
Monitoring, Routine Major (TCR)
—
Coliform (TCR)
May 1, 1993 – May 31, 1993
Archived
Monitoring, Regular
—
Benzene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Toluene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Styrene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Xylenes, Total
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
p-Dichlorobenzene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,2-Dichloroethane
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Carbon tetrachloride
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
1,2-Dichloropropane
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
Trichloroethylene
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
CHLOROBENZENE
April 1, 1993 – June 30, 1993
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Xylenes, Total
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
o-Dichlorobenzene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
1,2-Dichloroethane
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Carbon tetrachloride
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
1,2-Dichloropropane
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Trichloroethylene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
CHLOROBENZENE
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Benzene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Styrene
January 1, 1993 – March 31, 1993
Archived
Monitoring, Regular
—
Styrene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Xylenes, Total
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
1,2-Dichloroethane
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Carbon tetrachloride
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Tetrachloroethylene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Benzene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Ethylbenzene
October 1, 1992 – December 31, 1992
Archived
Monitoring, Regular
—
Styrene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Xylenes, Total
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
o-Dichlorobenzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
p-Dichlorobenzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,1-Dichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
trans-1,2-Dichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,2-Dichloroethane
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,1,1-Trichloroethane
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Carbon tetrachloride
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
1,2-Dichloropropane
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Trichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Tetrachloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
CHLOROBENZENE
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Benzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Toluene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Ethylbenzene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
cis-1,2-Dichloroethylene
July 1, 1992 – September 30, 1992
Archived
Monitoring, Regular
—
Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Period	Violation	Contaminant / rule	Health-based	Status
July 1, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Unaddressed
April 1, 2025 – August 27, 2025	Lead Consumer Notice	Lead and Copper Rule	—	Resolved
February 10, 2024 – April 8, 2024	Public Notification Violation for NPDWR Violation	Public Notice	—	Resolved
April 2, 2023 – June 22, 2023	OCCT/SOWT Study/Recommendation	Lead and Copper Rule	Health-based	Resolved
January 1, 2022 – December 31, 2022	Monitoring, Regular	Nitrate	—	Resolved
March 12, 2005 – July 28, 2005	Public Notification Violation without NPDWR Violation	Public Notice	—	Resolved
April 1, 2004 – June 30, 2004	Monitoring and Reporting (DBP)	Total Haloacetic Acids (HAA5)	—	Resolved
May 1, 2002 – May 31, 2002	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
July 1, 1998 – July 31, 1998	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
July 1, 1995 – July 31, 1995	Monitoring, Routine Minor (TCR)	Coliform (TCR)	—	Archived
May 1, 1993 – May 31, 1993	Monitoring, Routine Major (TCR)	Coliform (TCR)	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Benzene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Toluene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Styrene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Xylenes, Total	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	p-Dichlorobenzene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,2-Dichloroethane	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Carbon tetrachloride	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	1,2-Dichloropropane	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	Trichloroethylene	—	Archived
April 1, 1993 – June 30, 1993	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Xylenes, Total	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	o-Dichlorobenzene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	1,2-Dichloroethane	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Carbon tetrachloride	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	1,2-Dichloropropane	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Trichloroethylene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	CHLOROBENZENE	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Benzene	—	Archived
January 1, 1993 – March 31, 1993	Monitoring, Regular	Styrene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Styrene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Xylenes, Total	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	1,2-Dichloroethane	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Carbon tetrachloride	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Tetrachloroethylene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Benzene	—	Archived
October 1, 1992 – December 31, 1992	Monitoring, Regular	Ethylbenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Styrene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Xylenes, Total	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	o-Dichlorobenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	p-Dichlorobenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,1-Dichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	trans-1,2-Dichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,2-Dichloroethane	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,1,1-Trichloroethane	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Carbon tetrachloride	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	1,2-Dichloropropane	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Trichloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Tetrachloroethylene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	CHLOROBENZENE	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Benzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Toluene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	Ethylbenzene	—	Archived
July 1, 1992 – September 30, 1992	Monitoring, Regular	cis-1,2-Dichloroethylene	—	Archived
June 30, 1977 – June 29, 1981	Monitoring, Regular	Gross Alpha, Excl. Radon and U	—	Archived

Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)

Enforcement actions

August 27, 2025State Compliance achieved1 linked violation
July 29, 2025State Public Notification requested1 linked violation
July 29, 2025State Violation/Reminder Notice1 linked violation
July 16, 2025State Violation/Reminder Notice1 linked violation
April 15, 2024State Public Notification receivedgeneral compliance action — not tied to a specific violation on record
April 8, 2024State Compliance achieved1 linked violation
March 15, 2024State Violation/Reminder Notice1 linked violation
February 14, 2024State Compliance achievedgeneral compliance action — not tied to a specific violation on record
September 19, 2023State Compliance achieved1 linked violation
June 22, 2023State Compliance achieved1 linked violation
April 17, 2023State Violation/Reminder Notice1 linked violation
April 17, 2023State Public Notification requested1 linked violation
March 27, 2023State Public Notification received1 linked violation
February 9, 2023State Public Notification requestedgeneral compliance action — not tied to a specific violation on record
February 9, 2023State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
February 6, 2023State Violation/Reminder Notice1 linked violation
February 6, 2023State Public Notification requested1 linked violation
September 30, 2005State Compliance achieved1 linked violation
August 5, 2005State Bilateral Compliance Agreement signed3 linked violations
July 28, 2005State Compliance achieved2 linked violations
July 28, 2005State Public Notification received2 linked violations
July 26, 2005State Formal Notice of Violation issued3 linked violations
February 7, 2005State Violation/Reminder Notice1 linked violation
September 29, 2004State Compliance achieved2 linked violations
May 16, 2003State Public Notification received1 linked violation
September 15, 1998State Violation/Reminder Notice1 linked violation
September 15, 1998State Public Notification requested1 linked violation
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved4 linked violations
October 19, 1993State Compliance achieved5 linked violations
October 19, 1993State Compliance achieved5 linked violations
October 19, 1993State Compliance achieved6 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved3 linked violations
October 19, 1993State Compliance achieved68 linked violations
July 10, 1993State Public Notification requested1 linked violation
July 10, 1993State Violation/Reminder Notice1 linked violation
July 7, 1993State Violation/Reminder Notice17 linked violations
July 7, 1993State Public Notification requested17 linked violations
April 20, 1993State Violation/Reminder Notice17 linked violations
April 20, 1993State Public Notification requested17 linked violations
January 19, 1993State Public Notification requested17 linked violations
January 19, 1993State Violation/Reminder Notice17 linked violations
July 1, 1992State Public Notification requested17 linked violations
July 1, 1992State Violation/Reminder Notice17 linked violations
March 16, 1990State Public Notification issuedgeneral compliance action — not tied to a specific violation on record
January 13, 1990State Violation/Reminder Notice1 linked violation
January 13, 1990State Public Notification requestedgeneral compliance action — not tied to a specific violation on record

Contact

MANGUM, JAMES

815-277-9589

WONDER LAKE, IL 60097